AWRL6844: SPIB IOSET pad naming is strange, is it an error in datasheet?

Part Number: AWRL6844

Tool/software:

Hi,

In AWRL6844 datasheet, you can see the SPIB signal IOSET table below.

However, what is PAD_AA, PAD_AB..., there's no such pad in AWRL6844.

Could you clarify?